Algorithms overlaying a Stitch Fix photo shoot

Algorithms Team

Weaving data science pervasively throughout our business

"There's an algorithm for that!" (Take the tour to learn more.)
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From the algorithms blog

Our Pulse

A row of data analysts working on laptops
Data artistry
We love what we do: Quantify art and fashion to build recommendation algorithms to make our clients look their best.
Technological greenfield
We’ve built just a fraction of the tools and solutions that we need. The combination of data and fashion puts us in a unique place where we can forge the next generation of tools and methods.
Focus on what matters
Our data is information-rich and resides in robust and easy to access platforms. This allows us to focus on the models, methods, and code to achieve our objectives.

Our Teams

A casual discussion between Stitch Fix employees
Client Algorithms
Understand our clients, predict their demands, and optimize operations.
Styling Algorithms
Meet the recommendation engineers: Where the art and fashion is quantified and shipped.
Merch Algorithms
Mastering the science of clothing, inventory, and complex logistics.
Data Platform
Build robust and powerful technologies to store, access, and compute data.

Academic Collaborations

Social Algorithms Labs @ Stanford (SOAL)

The Algorithms team works closely with SOAL where a group of interdisciplinary researchers focus on social and economic science and computational science and algorithms.

Stanford Industry Affiliates

We are a member of the Industrial Affiliates Program of the Statistics Department at Stanford, helping us stay abreast of the latest statistical techniques and build relationships with statistical researchers.

algorithms Careers

algorithms Team

Eric Colson

Eric Colson
Chief Algorithms Officer

Eric loves the austere beauty of data and analytics. He could easily go too far if practicality didn’t rein him in now and again. Hails from the SF Bay Area.

Stella Yang

Stella Yang
Client Algorithms

Stella likes working with data and apply economic theory to solve real business problems, with the help of statistical and machine learning. She also has a passion of learning new tools and math to understand the fundamentals of a problem. In her spare time, she enjoys traveling, cooking and yoga.

John Clevenger

John Clevenger
Client Algorithms

John is a data scientist with a passion for inference under uncertainty. He prefers his inferences to be logically coherent but generally uses null hypothesis significance testing anyway. He's a big fan of being outside with his wife, hazy ipas, and the Dodgers. Past John was a cognitive scientist who used to be a philosopher.

Alex Smolyanskaya

Alex Smolyanskaya
Client Algorithms

Alex likes getting to a point of empathy with data, preferably while listening to dance music. When not computing, she can be found birding, skiing, or hanging with her parrot. Born in Ukraine, raised in Brooklyn.

Andy Almand-Hunter

Andy Almand-Hunter
Merch Algorithms

Andy likes espresso, rock climbing, and computer code. He loves the unreasonable effectiveness of mathematics in everything from physics to fashion. Hails from Maine, but has slowly been making his way west, and is happy to finally call the Pacific coast home.

Erin Boyle

Erin Boyle
AI Instruments

Erin loves solving puzzles with data. She's thrilled to finally land on the West Coast after growing up in the DC area and doing her graduate degree in Wisconsin. Outside of the office she adores mountains, city biking, music, and everything else San Francisco has to offer.

Chris Moody

Chris Moody
AI Instruments

Chris loves high performance computing, high dimensions & high fashion. He loves learning the beautiful symmetries between physics, data, and analytics. Hails from Spain & South Carolina.

Hilary Parker

Hilary Parker
Styling Algorithms

Hilary is an R and statistics enthusiast determined to bring rigor to analysis wherever she goes. She comes from Etsy, and before that the world of Biostatistics. At Stitch Fix she works on teasing apart correlation from causation, with a strong dose of reproducibility.

Jacob Perkins

Jacob Perkins
Data Platform

Jacob enjoys solving weird problems, especially when they involve graphs, infrastructure, or data modeling. Preferably some combination of the three. When not writing code he's working on a sculpture or practicing aerial acrobatics.

Matt Wittmann

Matt Wittmann
Merch Algorithms

Matt gets excited about using math and computers to better understand and predict the behavior of complex systems. A physicist by training, he enjoys random walks, simplifying assumptions, and minimizing entropy. Outside of the office, Matt can often be found outdoors cycling, hiking, snowboarding, or otherwise fullfilling his obligations as a native Coloradan.

Anahita Hassanzadeh

Anahita Hassanzadeh
Styling Algorithms

Anahita likes optimizing everything, from computing time to trip planning. She grew up in Iran, lived in the south and the east coast before landing in the bay area. She enjoys pottery, biking, hiking and pretty much anything related to nature.

Steven Troxler

Steven Troxler
Merch Algorithms

Steven likes python, scala, and board games. In his free time he enjoys running and playing the blues. Hails from Phoenix.

Brad Klingenberg

Brad Klingenberg
VP of Data Science

Brad likes statistics, messy data and all things Python. Originally from Colorado, he now lives in the SF Bay area and enjoys the local coffee and hiking.

Jasmine Nettiksimmons

Jasmine Nettiksimmons
Styling Algorithms

Jasmine enjoys uncovering hidden relationships in life and nature using statistics and quantifying feelings on a scale of 1-10. She also loves iced tea, British mystery shows, Swedish mystery novels, knitting, river swimming, and spendy cheese.

Patrick Foley

Patrick Foley
Styling Algorithms

Patrick enjoys math and maps, and he loves Arizona (U of A) college basketball. He is language agnostic, and prefers trying the simplest things first. AZ -> CA -> PA -> CA.

Kurt Bollacker

Kurt Bollacker
Data Platform

Kurt has been a scientist, a software engineer, a digital archivist, and random problem solver. He also engages in cake baking, circus aerial, and biking around the city. He enjoys problems that have no obvious solution. You can always bribe him with excellent food, especially desserts.

Patric Glynn

Patric Glynn
Client Algorithms

Patric enjoys using data to bring a greater understanding to business problems. Hailing from Ohio, he's been enjoying having variety to the terrain around him. When not in front of a computer you'll find him hiking or playing the banjo with like-minded bluegrass enthusiasts.

Daragh Sibley

Daragh Sibley
Merch Algorithms

Daragh enjoys home brewing, rock climbing, and R. He tries to avoid all three in the same evening. You can typically find him over caffeinated and over excited about his latest analytic project. Hails from the Washington, DC area.

Allison Hata

Allison Hata
Client Algorithms

Allison comes to Stitch Fix with a statistics and econometric background. She loves using data to solve complex problems and reveal meaningful trends. She also loves all kinds of desserts and snacks. She's currently working on predicting the future demand of the Stitch Fix business. Born and raised in the Bay Area.

Cian Menzel-Jones

Cian Menzel-Jones
Merch Algorithms

Cian loves developing original ideas based on insights from data whether it's in geophysics, molecular spectroscopy or women's fashion. Outside of the office he'll probably be playing a sport. Hails from Vancouver, BC.

Ian Horn

Ian Horn
Styling Algorithms

Ian is eternally curious how everything works, so he loves data. Professionally, he thinks static typing and functional languages are pretty cool. In his native habitat of the Bay Area, you can frequently find him cooking, reading, or swimming.

Jeff Magnusson

Jeff Magnusson
Data Platform

Jeff likes Python, coffee, and combining the two to build data infrastructure that’s incredibly easy and fun to use. Hails from Texas.

Jason Liu

Jason Liu
AI Instruments

Jason spends his time between evangelizing this love for mathematics, longboarding and thinking about art. He enjoys working on problems that try to better understand and benefit people and society whether it's social media, public health, or even fashion!

Tara Lydiard-Martin

Tara Lydiard-Martin
Client Algorithms

Tara loves using data and visualizations to make complex systems feel intuitive. In her free time she enjoys ultimate frisbee, dancing, and the Brazilian martial art of capoeira. Hails from Seattle.

Usman Raza

Usman Raza
Data Platform

Usman enjoys trying to distill complex interactions into their most basic parts using machine learning. In his free time he can be found reading, climbing, playing at the FLGS, and exploring San Francisco through it's restaurants and coffee shops. Most recently hails from Canada.

Greg Novak

Greg Novak
Global Optimization

Greg is a fan of late binding, dynamic typing, black holes, bourbon, and using data to understand the world. When he's not helping women find clothing they'll love, Greg is likely to be cycling, backpacking, or playing ice hockey.

Brian Coffey

Brian Coffey
Styling Algorithms

Brian likes trying to describe the world with math, usually in the hopes of making it more efficient and beautiful. Hails from Canada, background in liberal arts, mechanical engineering, operations research and architecture. In his free time he can be found outside, in a book or at a piano.

Ceslee Montgomery

Ceslee Montgomery
Client Algorithms

Ceslee loves working at the intersection of people & data. She's got a B.A. in Sociology from Stanford and is working on conversion & better data at Stitch Fix.

Kevin Zielnicki

Kevin Zielnicki
Styling Algorithms

Coming mostly recently from data science consulting, Kevin is working on algorithms to help people understand and respond to written feedback. After a past life as a quantum mechanic, he is happy to work with data that can be observed without changing its value.

Kenna Nelson

Kenna Nelson
Client Algorithms

Kenna loves using data to tell stories. Outside of the office, she especially enjoys cooking and exploring new places. Hails from Minnesota.

Dave Spiegel

Dave Spiegel
Merch Algorithms

Dave loves using tools of statistical inference to understand the world better. Also likes astronomy, basketball, dogs, swinging from rings, and wants to wean himself from football. Hails from Boston.

Akshay Wadia

Akshay Wadia
Data Platform

Akshay is from India, and thus, consumes vast quantities of Test cricket. He is fascinated by how algorithmic thinking turns complex problems into elegant code. He enjoys building data platforms, and pondering programming semantics. When not working with data, he is usually reading Wodehouse.

Sonya Berg

Sonya Berg
Client Algorithms

Sonya is passionate about solving business problems using logic, math, and data. She generally prefers being outside, traveling by foot or by bike. Sonya ruins her active nature with her love of cooking and enjoying very rich foods, e.g. cakes. Native Californian.

Patrick Sun

Patrick Sun
Data Platform

Patrick Sun is a frontend engineer on the Data Platform team and is working on building the frontend infrastructure, UIs and data visualizations for internal data science tools at Stitch Fix.

Tatsiana Maskalevich

Tatsiana Maskalevich
Styling Algorithms

Tatsiana enjoys theory of probability, coffee, farmers markets, tomatoes, all things pickled, and soup. When she not telling stories using data, Tatsiana enjoys to be outside hiking, cycling, camping, and visiting new places around the world. Originally from Belarus, she is happy to call San Francisco her home.

Jas Khela

Jas Khela
Client Algorithms

Jas believes data can be used to solve any problem. He also believes the way to a woman’s heart is through her wardrobe. Jas enjoys traveling, binge watching TV series on Netflix, and spy movies. Hails from Fresno.

Qi Gao

Qi Gao
Styling Algorithms

Qi likes uncovering insights from data using Statistics. Some of her favorites are R, Panda and Yellowstone NP. She also enjoys cooking, drawing and playing drums.

Akshay Rao

Akshay Rao
Client Algorithms

Akshay enjoys using data as a window to learn about why people make certain economic decisions. Raised in the Bay Area, he spends his spare time passionately following the 49ers, Warriors, and SF Giants.

Kyle Schmaus

Kyle Schmaus
Styling Algorithms

Kyle likes machine learning, R, and oxford commas. He enjoys learning new topics inside and out. During his free time he loves cooking, biking, yoga, and playing board games. Hails from the San Francisco Bay Area.

Sally Schoeffler

Sally Schoeffler
Merch Algorithms

Sally is excited about problem solving and learning new things from data. Originally from Australia, she loves to travel and be outdoors. She will happily eat cereal for every meal, despite also really enjoying cooking and baking.

John McDonnell

John McDonnell
Client Algorithms

John has a passion for learning, often with the aid of machines. He is a devout Bayesian but a Python vs R agnostic. He claims to be from Seattle, but he's lived all over the northerly parts of North America.

Tarek Rached

Tarek Rached
Data Platform

Tarek builds tools that reveal how things work. An engineer by training, he's worked in data-focused organizations in the energy and programmatic advertising industries. Loves bikes, boards, and other people's dogs.

Aaron Bradley

Aaron Bradley
Data Platform

Aaron likes big ideas and transforming today's impossible into tomorrow's commonplace. He joins us from northern Colorado and enjoys good wine, tasty coffee, and building battle-ready robots.

Derek Bennett

Derek Bennett
Data Platform

Derek’s passion is creating applications that offer new insights and support decision making. He is equally comfortable playing with new technologies or tinkering with antiquated photography equipment. When not developing with Scala, Java or Python, Derek enjoys hiking and outdoor activities along with travel, art, and wine tasting. Care and feeding can be accomplished with a good cup of coffee, an IPA, or a long lunch.

Songya Pan

Songya Pan
Merch Algorithms

Hailing from China, coming from rocket science and working on optimization problems.

Doug Rudd

Doug Rudd
Merch Algorithms

Doug spends his inside time using computers of various size to solve problems of concomitant scale. While outside he can be found hiking, diving, climbing, and otherwise enjoying the third dimension. Originally from AZ, but lately from IL, he's glad to be back where elevation changes.

Chris Rinaldi

Chris Rinaldi
Merch Algorithms

In a previous life, Chris worked with the Department of Homeland Security and the US Army to create predictive models and perform threat analyses. Now, he uses data to help design and analyze clothing.

Stefan Krawczyk

Stefan Krawczyk
Data Platform

Stefan loves the stimulus of working at the intersection of design, engineering, and data. He grew up in New Zealand, speaks Polish, and spent formative years at Stanford, LinkedIn, Nextdoor & Idibon. Outside of work Stefan likes to 🏊, 🌮, 🍺, and ✈.

Helena Wang

Helena Wang
Merch Algorithms

Helena tries to make sense of the world through science and data. She also likes traveling, coffee, strange foods, languages, and big fluffy dogs. China → SF → LA → NYC → SF.

Thomas Millar

Thomas Millar
Data Platform

Despite graduating and becoming a full-time platform engineer here at Stitch Fix, he will forever be seen as our intern. He may spend his days wrestling distributed systems into submission and his nights cooking, but he’s only really good for grabbing the rest of the team coffee. Thanks Thomas!

Elizabeth Bennett

Elizabeth Bennett
Data Platform

Elizabeth Bennett, a Denver native, moved to the Bay Area shortly after graduating from college with degrees in Computer Science and Bassoon Performance. While most of her days are spent writing Python for Stitch Fix's data platform, she does manage to spend a fair amount of time knitting, bouldering, and gaming. Also, it is in fact true that Jane Austen named her character after Elizabeth.

Jeff Schecter

Jeff Schecter
Styling Algorithms

Jeff appreciates clever loss functions, latent spaces with interesting properties, and generative models for funky high-dimensional distributions. He makes wheel-thrown ceramics and comes from North Carolina.

Neelesh Salian

Neelesh Salian
Data Platform

Neelesh works to help make Data products. He travels, eats random cuisines and listens to 80s music more than you think. Is teaching himself to be a better photographer and is also fascinated with Architecture. Misses Bombay, India, where he grew up, fairly close to a beach.

Hoda Eydgahi

Hoda Eydgahi
Styling Algorithms

likes 🍪 & 🂱.

Jana Beck

Jana Beck
Data Platform

Jana loves the Frankenstein’s monster-ish mashup of engineering, visual art, design, and cognitive science that is data visualization. Outside of work, Jana is oft to be found in a dance studio, mostly doing classical ballet.

Paul Hager

Paul Hager
Data Platform

Paul loves strategic game theory, mathematics, and languages. He is a fan of show tunes and is able to consume copious amounts of 🌮. Socrates truly meant the unquantified life is not worth living 😉

Dan Tasse

Dan Tasse
Merch Algorithms

Dan grew up writing code, then discovered that the most fun part of that was learning new things from data. You might find him traveling to kind of inconvenient places. Also: bikes, coffee, amaro, Talking Heads, word games, Pittsburgh.

David Yang

David Yang
Styling Algorithms

As a Bayesian data scientist, David enjoys developing statistical models for personalized services via discovering functional and emotional connections between consumers and products from a holistic perspective. He enjoys traveling, snow skiing, and long distance running. Hails from east China.

Michael Hochster

Michael Hochster
Styling Algorithms

Mike enjoys making data useful, by any means necessary. Outside of work he enjoys running and probably some other things he's forgotten because he got up so early to run. Originally from Ann Arbor, Michigan, he's lost all tolerance for cold weather by living most of his adult life in California.

Xiyu Peng

Xiyu Peng
Client Algorithms

Three important questions Xiyu thinks about every single day are: where to eat (cannot live without food), what clothes to wear (we care about style) and how to do data science (data is treasure!). Besides these, she also likes dancing, hiking and spicy food.

Anna Schneider

Anna Schneider
Merch Algorithms

Anna enjoys studying stochastic systems, writing maintainable Python, and crafting well-posed problems. Outside of work, she has fun creating food projects, dancing, hiking, and spawning nonprofits. She grew up in rural New York and came to Stitch Fix via biophysics and clean energy.

Adam Draginda

Adam Draginda
Data Platform

Adam is passionate about bridging the gaps between science and engineering. He has a diverse career history, having worked in the fields of astronomy, agriculture, and climate science. Besides programming, Adam enjoys running, board games, playing music, and watching ice hockey (go Oilers!). He's originally from Canada but recently transplanted from Hawaii.

Shelly Jang

Shelly Jang
Merch Algorithms

Shelly enjoys using data to build compelling narratives, mining self-logs for quantified self, and lifting heavy things. Hails from Seoul, and calls Seattle second home.

Laura John

Laura John
Analytics Engineering

Laura enjoys making clean, organized, and optimized data structures to provide useful data to help solve business problems. When not working with data, she enjoys running, reading, drinking coffee and wine, and spending time with family. Hails from Ohio.

Juliet Hougland

Juliet Hougland
Data Platform

Juliet can't decide if she wants to be a mathematician or a software engineer. In her free time, she can't decide if she is a weightlifting meathead or a dog fanatic.

Cong Lu

Cong Lu
Merch Algorithms

Lu believes that the world can always be explained, and often predicted in a quantitative way. He enjoys tennis, skiing and jogging while he is not analyzing data, and also spent a lot of time trying great food and playing board games with friends. Hails from China and grew up all over the place as a "military brat".

Miriam Leon

Miriam Leon
Client Algorithms

Miriam came to Stitch Fix from London, where she studied synthetic biological systems. She spends her days looking for answers in data, climbing on walls and dreaming of exotic travels. Greece → UK → SF.

Alexis Pribula

Alexis Pribula
Merch Algorithms

Alexis fell in love with pure math a while back, he loves how it converts complex problems into beautifully simple results. After an educational experience as a startup founder, Alexis now mostly obsesses on how to have maximum impact. Alexis grew up in Geneva Switzerland and likes chocolate, fondue, and skiing. He also picked up surfing on his way to California.

Andrew Andreasen

Andrew Andreasen
Analytics Engineering

With a rich history in data architecture, Andrew loves empowering others with curated data. He especially loves PySpark. And food. Sometimes together. When he’s not eating or cooking, he enjoys hiking through gardens, zoos, and misty mountain trails with his wife and two kids.

Agnieszka Szefer

Agnieszka Szefer
Styling Algorithms

Agnieszka can't decide whether she wants to be an engineer or a data scientist so she became a hybrid of both. She holds an MEng in Computing from Imperial College London. Originally from Poland, loves traveling, driving cars and learning languages.

Danielle Fisher

Danielle Fisher
Client Algorithms

Dan lives her life by the three Rs — running, reading, and ‘rithmatic. She loves the thrill of building and analyzing data driven models to gain insights about the real world. When not at work, you’ll probably find her out for a run, curled up with a good book, or spending time with her friends and family. Hails from Philly (yes, an Eagles fan, but not the battery-throwing kind).

Andrew Ho

Andrew Ho
Merch Algorithms

Andrew, originally from Toronto, is coming here from Vancouver where he did his PhD in 3D fluid simulation of swallowing. He loves playing squash and is a huge fan of the Toronto Raptors.

Stephanie Yee

Stephanie Yee
Client Algorithms

Stephanie likes post-it notes, black sweaters, and making complex ideas more intuitive. An economist at heart, she studied statistics because it helps the world make sense.

Zack Nichols

Zack Nichols
Client Algorithms

Zack Nichols is a data scientist and machine learning engineer. He previously worked at Knewton, Inc on on-line tutoring systems, at Sum, Inc. on real-time health predictions and sensor algorithms, and at Spotify on ads and on-boarding funnel optimization. He holds a PhD in computational neuroscience from Cornell University, and enjoys trying (without success) to keep up with trends in music.

Mark Dijkstra

Mark Dijkstra
Global Optimization

Mark loves simplicity in models, and using data to understand complex phenomena. Hails from the Netherlands, though a career in astronomy led him all over the world with his family for many years. It seems only fitting he now works on global optimization. Mark also likes the ocean, its inhabitants, SUP, and lifeboats.

Eddie Landesberg

Eddie Landesberg
Client Algorithms

Eddie enjoys using fully bayesian inference to inform business decisions that incorporate information and uncertainty from a variety of sources. In his leisure time, he enjoys hiking / backpacking, exploring the west coast and drinking (often Belgian) beer. In his home life, he reads textbooks and loads his dishwasher with extreme precision. Hailing from the suburbs of NYC, he's still in awe of the natural beauty of the west.

Xinyu Tian

Xinyu Tian
Client Algorithms

Xinyu appreciates logics. Exploring logics from data is the most thrilling thing for her. She likes to be challenged and hates living a boring life.

Edward Banner

Edward Banner
Data Platform

Edward loves algorithms and expressing them visually. He also enjoys flipping through the air at trampoline parks and cruising around San Francisco on two wheels. He also likes tennis and appreciates a good rally.

Divya Prabhakar

Divya Prabhakar
Data Platform

Divya builds visualizations and tools to enable the seamless communication of ideas and insights. She hails from Austin, Chennai, and Philly all at the same time. Her interests include guinea pigs and consuming tweets, podcasts and punditry about only the most cerebral TV shows (e.g. Gilmore Girls, Siesta Key, Project Runway).

Patrick Zheng

Patrick Zheng
Analytics Engineering

Patrick loves using data to give people a better version of themselves and help them reach their full potential. In his free time he enjoys basketball, LCHF food and hacking. Hails from Beijing, China.

Natalia Gardiol

Natalia Gardiol
Styling Algorithms

Natalia loves brains and figuring out how they make decisions under uncertainty. She holds a PhD in computer science from MIT, and is fond of riding, racing, breaking, fixing, and falling off of all kinds of bicycles. On a constant lookout for tombstone mottos, Natalia believes a good bias is hard to find.

Brinda Thomas

Brinda Thomas
Merch Algorithms

Brinda enjoys analyzing data, building Python applications, learning new mathematical and machine learning techniques, and writing about technical and policy topics. She's also involved with clean energy and climate change activism with local non-profits, likes to mess around with electronics, and scuba dive around the world. She grew up in three countries, including the Washington, D.C. area in the U.S.

Fulya Ozcan

Fulya Ozcan
Merch Algorithms

A hardcore Bayesian with a background in econometrics and statistics, Fulya has a passion for making sense of the world using data. When not writing code (🐍 ), she loves basking in the sun by the beach. Hails from the Aegean coast, calls the Golden coast her home.

Brian Amadio

Brian Amadio
Merch Algorithms

Brian discovered his love for data, machine learning, and Python while searching for microscopic black holes and extra dimensions at the Large Hadron Collider. He loves travelling, digital photography, and rock climbing.

Dan Wiesenthal

Dan Wiesenthal
Merch Algorithms

Dan loves exploring the intersection between sophisticated algorithms and the human experience of them. He holds a Computer Science MS and Symbolic Systems BS from Stanford, and likes reading scifi space operas, studying new languages, meditating, and cruising around Golden Gate Park on a longboard. While his organism began life on the east coast, he calls San Francisco home because he became the conscious being that he now is right here in SF—which is, of course, a very SF thing to say.

Meaghan Paulosky

Meaghan Paulosky
Analytics Engineering

Meaghan was first bitten by the data bug when she tried analyzing the impact of sleep deprivation on college test scores in lieu of submitting a term paper. Her professor still made her write the paper, but she decided to continue building analyses that could make life a little easier. Other interests include hiking, road trips, and trying out new hobbies - currently it’s boxing. Hails from Philadelphia, but she will not chant EAGLES. Go Big Blue!

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